Enable size_t to int truncation warnings in PPAPI

ppapi/proxy/video_capture_resource.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/proxy/video_capture_resource.h"
 
 #include "ppapi/c/dev/ppp_video_capture_dev.h"
 #include "ppapi/proxy/dispatch_reply_message.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
@@ skipping 148 matching lines @@
     resources[i] = ppapi::proxy::PPB_Buffer_Proxy::AddProxyResource(
         buffers[i], handles[i], buffer_size);
   }
 
   buffer_in_use_ = std::vector<bool>(buffers.size());
 
   CallWhileUnlocked(ppp_video_capture_impl_->OnDeviceInfo,
                     pp_instance(),
                     pp_resource(),
                     &info,
-                    buffers.size(),
+                    static_cast<uint32_t>(buffers.size()),
                     resources.get());
 
   for (size_t i = 0; i < buffers.size(); ++i)
     tracker->ReleaseResource(resources[i]);
 }
 
 void VideoCaptureResource::OnPluginMsgOnStatus(
     const ResourceMessageReplyParams& params,
     uint32_t status) {
   switch (status) {
@@ skipping 45 matching lines @@
     open_callback_->Run(params.result());
 }
 
 void VideoCaptureResource::SetBufferInUse(uint32_t buffer_index) {
   CHECK(buffer_index < buffer_in_use_.size());
   buffer_in_use_[buffer_index] = true;
 }
 
 }  // namespace proxy
 }  // namespace ppapi